Almot
out there
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100 AH, flooded, 66-69 lbs.
100 AH, Li, 29-31 lbs.
Brain-dead sellers jumping on a new bandwagon, "One-fifth the weight of a traditional battery", yahooo....
More usable capacity, yes, but not 2 or 3 times more. 70-75% of Li vs 50% of flooded, this is 1.4-1.5 times more capacity.
I'm curious, is there any drop-in Gr31 Lithium, 12V, with BMS, that weighs less than 25 lbs?
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GordonThree
Northern Michigan
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Is that a lithium iron battery? I've read 80% capacity at a minimum, more depending on chemistry and management.
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John & Angela
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Almot wrote:100 AH, flooded, 66-69 lbs.
100 AH, Li, 29-31 lbs.
Brain-dead sellers jumping on a new bandwagon, "One-fifth the weight of a traditional battery", yahooo....
More usable capacity, yes, but not 2 or 3 times more. 70-75% of Li vs 50% of flooded, this is 1.4-1.5 times more capacity.
I'm curious, is there any drop-in Gr31 Lithium, 12V, with BMS, that weighs less than 25 lbs?
Both our cars are Electric.
I don’t know if I would do it all the time but we run our cars down to 5 to 10 percent once in awhile when we make a certain trip and don’t want to stop at a DC fast charge for twenty minutes. The cars don’t seem to care. Probably only a few times a year but that would probably be the same in the RV world.
I haven’t looked into it much. Are the RV lithium ion batts ok with standard RV converters? What does a group 31 lithium ion cost nowadays.
2003 Revolution 40C Class A. Electric smart car as a Toad on a smart car trailer
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Almot
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Electric car battery works in different conditions, it has (I think) liquid cooling system that drop-in batts don't.
I'm not sure it really goes down to 5%, what you see on display is not necessarily it, they might show you only % of a "usable charge", but I don't have electric car. Common recommendation for drop-in 12V Li, and 24-36-48 batts of scooters, ebikes etc is running it in 20%-90% SOC.
Quote:Are the RV lithium ion batts ok with standard RV converters?
It needs slightly higher bulk voltage, and Float voltage is zero - charging must stop when full. But let's not deviate.
So... Anybody saw 20 lbs Gr31? ![[emoticon]](https://forums.goodsamclub.com/sharedcontent/cfb/images/wink.gif "wink")
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MrWizard
Traveling
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Charger voltage depends on the number of series cells and the cell chemistry
The avg new 14+v converter is to high for a 3* 3.7v setup
The liFePos are 3.2v per cell and use four cells in series
4*3.2v
An inexpensive 100 ampHr 12v LiFe made from 18 cells of Chevy volt battery
Is $400
A car box drop in is around $900
* This post was
edited 01/05/18 09:40am by MrWizard *
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2oldman
Pahrump
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Almot wrote:I'm curious, is there any drop-in Gr31 Lithium, 12V, with BMS, that weighs less than 25 lbs? Probably not one you'd be willing to pay a grand for.
Can't say I've heard too much complaining about their weight.
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John & Angela
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Almot wrote:Electric car battery works in different conditions, it has (I think) liquid cooling system that drop-in batts don't.
I'm not sure it really goes down to 5%, what you see on display is not necessarily it, they might show you only % of a "usable charge", but I don't have electric car. Common recommendation for drop-in 12V Li, and 24-36-48 batts of scooters, ebikes etc is running it in 20%-90% SOC.
Quote:Are the RV lithium ion batts ok with standard RV converters?
It needs slightly higher bulk voltage, and Float voltage is zero - charging must stop when full. But let's not deviate.
So... Anybody saw 20 lbs Gr31?
I think I remember reading that. When my car turtles (is completely dead) its not actually dead. The BMS controls that I believe. I have never turtled either car so don't actually know what happens.
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Isaac-1
SW Louisiana
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Here is one that is 28 pounds http://www.lifebluebattery.com/order-lifeblue-lithium-rv-battery/100ah-lifeblue-lithium-rv-battery.html it even has built in a bluetooth connected BMS
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MEXICOWANDERER
las peñas, michoacan, mexico
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I don’t know if I would do it all the time but we run our cars down to 5 to 10 percent once in awhile when we make a certain trip
Is this not what you are ALLOWED to take from the battery and not the same thing as ADVERTISED ampere hours on individual Li-ion batteries?
Is there not a chart that explains depth of discharge of a Li-Ion battery versus expected cycle life? I seem to be having trouble finding one...
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Itinerant1
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Mex possibly from here? ...Battery University lithium
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